Apogee Electronics Symphony Mk II 8×8 – 8 Mic/Line In x 8 Line Out Thunderbolt 3 Audio Interface with 2 x DB25 + AES, ADAT/SPDIF/SMUX Optical & SPDIF Coax
OVERVIEW
The Symphony Mk II 8×8 is a flagship professional audio interface designed for demanding recording, mixing and mastering applications. Combining Apogee’s renowned AD/DA conversion with Thunderbolt 3 connectivity, ultra-low-latency performance and an intuitive touchscreen display, it delivers the clarity, precision and workflow efficiency expected in a high-end studio. The 8×8 configuration provides eight mic/line inputs and eight line outputs, while its modular architecture can be expanded to support up to 32 channels of analogue I/O.
Designed to integrate seamlessly into professional production environments, Symphony Mk II offers extensive digital connectivity including dual DB25 connections, AES, optical ADAT/SPDIF/SMUX and coaxial SPDIF. Its advanced monitoring capabilities also make it suitable for immersive audio production, with Symphony I/O Mk II Thunderbolt Monitor Workflows providing control for Dolby Atmos, Sony 360 Reality Audio and other immersive formats with up to 32 speaker outputs.
With exceptionally low distortion, up to 126dB of D/A dynamic range and Apogee’s proprietary Perfect Symmetry Circuitry and Constant Current Drive headphone technology, Symphony Mk II is engineered to provide highly accurate monitoring and reliable performance. Designed and built in the USA, it is a professional-grade studio hub for engineers who require uncompromising sound quality and flexible connectivity.
KEY HIGHLIGHTS
Flagship Apogee Conversion
Symphony Mk II delivers exceptionally transparent conversion with up to 122dB of A/D dynamic range and 126dB of D/A dynamic range, providing the accuracy and detail required for professional recording, mixing and mastering.
8×8 I/O Configuration
The 8×8 configuration provides eight mic/line inputs and eight line outputs, giving professional studios a versatile foundation for tracking, mixing and outboard integration.
Modular I/O Architecture
Symphony Mk II features a modular design that can be configured for up to 32 channels of input and output, allowing the interface to grow with the needs of a professional studio.
Thunderbolt 3 Connectivity
Thunderbolt 3 provides high-speed connectivity and ultra-low-latency performance, making Symphony Mk II well suited to demanding recording and mixing workflows.
Extensive Digital Connectivity
Dual DB25 connections are complemented by AES, optical ADAT/SMUX and coaxial SPDIF connectivity, providing flexible integration with digital converters, external hardware and other studio equipment.
Ready for Immersive Audio
Symphony I/O Mk II Thunderbolt Monitor Workflows enable sophisticated monitoring configurations for Dolby Atmos, Sony 360 Reality Audio and other immersive audio formats, with support for up to 32 speaker outputs.
Intuitive Touchscreen Control
The integrated touchscreen display provides intuitive access to important interface and monitoring functions, helping streamline day-to-day studio operation.
Professional Headphone Monitoring
The front-panel stereo headphone output uses Apogee’s Constant Current Drive™ technology to maintain a smooth frequency response across different headphone types and impedance levels.
Built for Professional Studios
Designed and built in the USA, Symphony Mk II combines high-end conversion, flexible I/O, robust connectivity and professional monitoring capabilities in a single studio-focused interface.
FEATURES
- Flagship Apogee AD/DA conversion
- 8 mic/line inputs
- 8 line outputs
- Thunderbolt 3 connectivity
- Modular I/O architecture supporting up to 32 channels of analogue I/O
- Ultra-low-latency performance
- Intuitive touchscreen display
- Dual DB25 connectors
- AES digital connectivity
- Optical ADAT/SMUX connectivity
- Coaxial SPDIF connectivity
- Immersive audio monitoring with Symphony I/O Mk II Monitor Workflows
- Support for Dolby Atmos and Sony 360 Reality Audio workflows
- Control of up to 32 speaker outputs for immersive monitoring
- Apogee Perfect Symmetry Circuitry (PSC) on balanced outputs
- Constant Current Drive™ headphone technology
- 1 stereo 1/4″ front-panel headphone output
- Designed and built in the USA
- Connectivity options include Pro Tools HD, Dante, Thunderbolt and SoundGrid
TECHNICAL SPECS
Analog-to-Digital Conversion
THD+N: -115dB @ 22dBu (0.00020%), unweighted
Dynamic Range: 122dB A-weighted
Maximum Input Level (+4dB setting): +24dBu
Maximum Input Level (-10dB setting): +6dBV
Frequency Response: 20Hz–20kHz ±0.05dB @ 44.1kHz
Input Impedance: 10kΩ
Digital-to-Analog Conversion
THD+N: -119dB @ 21dBu (0.00014%), unweighted
Dynamic Range: 126dB A-weighted
Maximum Output Level: ∞ to +24dBu
Frequency Response: DC–20kHz ±0.05dB @ 44.1kHz
Output Impedance: 50Ω
Output Circuitry: Apogee proprietary Perfect Symmetry Circuitry (PSC)
Outputs: Balanced
Headphone Output
Outputs: 1 stereo 1/4″ headphone output on front panel
THD+N: -110dB @ 19dBu into 600Ω (80mW)
THD+N: -101dB @ 14dBu into 32Ω (470mW)
Dynamic Range: 121dB A-weighted
Technology: Apogee Constant Current Drive™
I/O & Connectivity
Analog Inputs: 8 mic/line
Analog Outputs: 8 line
Expansion: Modular I/O architecture, up to 32 channels
Digital Connectivity: AES, optical ADAT/SMUX and coaxial SPDIF
Host Connection: Thunderbolt 3
DB25: 2 connectors
Additional Connectivity Options: Pro Tools HD, Dante and SoundGrid
Immersive Audio
Monitor Workflows: Symphony I/O Mk II Thunderbolt Monitor Workflows
Immersive Formats: Dolby Atmos, Sony 360 Reality Audio and other immersive audio systems
Speaker Outputs: Up to 32
Power
Power Requirements: 90–240VAC, 50–60Hz
Power Consumption: 150W
Operating System & Compatibility
Thunderbolt: macOS 10.10 and later
Pro Tools HD/HDX: Mac or PC running Pro Tools HD 9 or later
Symphony Mk II Dante: Also compatible with PC













